3. Make more babies. This is what the Australian government decided to do. $4000 per child, no questions asked. (subsequent governments have fiddled with this

3. Make more babies. This is what the Australian government decided to do. $4000 per child, no questions asked. (subsequent governments have fiddled with this and pandered to their support base, but the concept still remains) The treasurer came out with a phrase 'one for mum, one for dad, one for the country'. It worked. Birth rates are now higher than they have ever been. I'm normally against this type of government wastage. But it's not hard to see that the $4000 will be earnt back within a ~25 year period once the child becomes an adult and starts paying taxes, even when you take inflation and future value of the $4000 into account. The $4000 was being paid out of revenue at the time as the government had no debt. (subsequent governments have started to borrow again, being unable to be fiscally responsible more than a couple of years) It's actually the smartest strategy of your three, because the old people need to have as many young taxpayers working as possible.